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Stock-Based Compensation (Classification Of Stock-Based Compensation) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation | $ 15.7 | $ 13.7 | $ 29.5 | $ 27.9
Share-based Payment Arrangement, Amount Capitalized | 0.2 | 0.5 | 0.5 | 0.8
Share-based Payment Arrangement, Expensed and Capitalized, Amount | 15.9 | 14.2 | 30.0 | 28.7
Cost Of Revenues [Member] |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation | 2.0 | 1.8 | 3.3 | 3.5
Research And Development [Member] |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation | 2.5 | 2.3 | 5.0 | 4.7
Selling, General And Administrative [Member] |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation | $ 11.2 | $ 9.6 | $ 21.2 | $ 19.7

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- Definition Amount of cost capitalized for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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